Amazon.com Inc took a big gamble this year by expanding its annual Prime Day summer sale to four days from two, betting the ...

Momentum Commerce, which manages online sales for 50 brands in a variety of product categories and price points, said its Amazon sales plunged 41% year over year on July 8.

Amazon stretched out its annual Prime Day sales event so that it lasted four days – twice as long as in the past – and, as a result, blew away previous sales figures.. The online retailing ...

While Amazon sales seemingly felt little impact from 2018 ... Post would expect retail share gains for Amazon, given its low-priced 1P strategy and robust 3P seller selection as consumers shop ...